MOZELT GmbH & Co. KG
Load lifting magnet devices
Technical manual:
CoolGen 4
Copyright:
MOZELT GmbH & Co. KG, D-47269 Duisburg
Edition:
August 2014
Rev.:
00
Page 8
English
2.3
Generator Drives
Depending on the type of mobile excavator, the power generator is mechanically or hydraulically driven.
Both variants are designed so that the necessary operating speed of the power generator is ensured as soon as the
diesel engine has reached its full speed.
2.3.1 Belt Drives
To ensure that the belt runs straight both axes must be flush with each other. The shaft axes shall be parallel with the
axis of the generator.
It is recommended to use a Laser alignment device for aligning the belt pulleys.
For adjustment of the pretension, we recommend the use of belt measuring devices. During and after installation, the
belt is to be revolved several times. This causes uniform settling of the pulley.
The first check of the run-in belt pulley is carried out after 0.5 to 4 hours.
The belt tension should be checked every 6 to 12 months and, if necessary, corrected.
2.3.2 Hydraulic Drives
Hydraulic generator drives are always to be supplied with a priority flow of hydraulic oil.
This means the supply flow should not be adversely affected by motor fluctuations, lifting, travelling or other
movements. Depending on the manufacturer of the construction machine, this is implemented in various technical
designs. Please ask the respective manufacturer for information on this matter or contact us for the alternative
solution of the „HydraBrain“ system.
With some hydraulic drives, optimum operation is also possible at low speed of the diesel engine. For this, please
check the manual of the mobile excavator manufacturer.
Never reach into the running belt
drive!
WARNING
Never operate the power generator
without belt guard!
WARNING
Fig.: 2 |
Belt drive
Fig.: 3 | Hydraulic drive with „BELL CLUTCH“ coupling
For hydraulic motor drives, speed peaks up to 4000 rpm are allowed at the moment of shutdown
of the magnet, if they do not last longer than 0.5 seconds. At speeds above 3400 rpm and below
2700 rpm, magnet operation is not, or only to a limited extent, possible.
CAUTION
CAUTION
It is particularly important that the speed
remains constant and does not show any
fluctuations!
CAUTION
Speeds above 3400 rpm can destroy the
power generator!
CAUTION
The speed should be measured not only
during no-load operation, but also during
the starting and shutdown phase!
